Whisk together yogurt, parsley, garlic, salt and lemon juice in a small bowl. Refrigerate until ready to use.
For medium-well hamburger: Place frozen Chop House Steak Burger Patty in a preheated pan over medium-high heat and cook 6 minutes. Turn patty over and cook for 3 minutes or until internal temperature reaches 160° F. Slice patty into fourths.
Warm pita bread if desired, place two-fourths of patty in pita bread, add Romaine lettuce, cucumber, cherry tomatoes and red onions. Sprinkle with feta cheese and dill sprigs. Drizzle with yogurt sauce.